Made In The USA – Amplifier Technologies Incorporated

ATI known for solid engineering and high performance. They use huge transformers and separate power supplies for each channel. And massive heat sinks to assure reliable operation. Some brands use cooling fans to save space, weight and cost but fans make noise and noise detracts from performance. They also ground all of their amplifiers at a single, central point instead of grounding them in the transformer. Their improved grounding lowers noise but it requires extra rectifiers in the power supply. Overall this creates a weight issue. Heat sinks and big transformers are heavy, so they use an extremely sturdy chassis. Skimping on any of these key elements would save cost, but performance / reliability would suffer and the end product would not be as good as they want it to be.

At ATI they make heavy-duty amplifiers with proven circuitry, meticulous assembly and rigorous testing designed to deliver state-of-the-art audio for years, all designed by them and built in their own US factory. It's a simple story, "American Muscle built by American muscle."

They design, engineer, and assemble all ATI products in their 50,000 square foot Southern California factory. Everything is built completely to their specifications and they monitor every aspect of the process themselves. They are convinced, that the efforts pay off in dependability and sound quality.

At the heart of any amplifier is the power supply. Its foundation is the power transformer. To assure the highest quality, they wind their own. For the transformer's core they use MOH with magnetic properties that increase efficiency 18% over conventional units. They wind the core two wires at a time, a technique called "bifilar winding" that ensures perfectly symmetrical transformers that maximize efficiency and reduce distortion. Each amplifier channel gets not only its own set of transformer windings, but its own rectifier and storage capacitors, thus giving each channel its own separate power supply. Even if the left channel is pushed to the limit by, say, a loud car crash on a movie soundtrack, it does not affect the power available to the other channels.

The gold-plated RCA input jacks on their amplifiers are mounted directly to the rear panel and not to the circuit board. While this technique complicates assembly, it results in a more robust connection and the jack cannot be accidentally broken off by the tight-gripping RCA plugs used in some audiophile interconnection cables.

ATI amplifiers employ lightening-fast optically-coupled protection circuits that are completely removed from the signal path so they cannot affect the sound quality. These protection circuits sense electrical "shorts" in speakers or wiring and sense electrical "spikes". If triggered, the circuit instantaneously disengages the output, samples the affected circuitry every 10 seconds and automatically restores proper operation when the fault is corrected. This special feature minimizes the chance of your amplifier going out of service just when you've filled your home theater with expectant guests.

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